CN113846917B

CN113846917B - Door shield

Info

Publication number: CN113846917B
Application number: CN202111155336.1A
Authority: CN
Inventors: 李伟; 张浪; 段思恭; 桑聪; 刘彦青; 姚海飞; 郑义; 张学超; 魏远; 曹泽宇; 徐长富
Original assignee: CCTEG China Coal Research Institute
Current assignee: CCTEG China Coal Research Institute
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-11-29
Anticipated expiration: 2041-09-29
Also published as: CN113846917A

Abstract

The invention discloses a door shield which comprises a shell, a rotating shaft and a baffle plate, wherein the lower end of the rotating shaft is positioned in the shell and can rotate relative to the shell, and the rotating shaft is suitable for being positioned between two door leaves; the baffle is connected with the upper end of the rotating shaft and can rotate between a first position and a second position, the baffle is suitable for being abutted against the same side of the two door leaves simultaneously to prevent the two door leaves from rotating in the first position, and the baffle allows the two door leaves to rotate in opposite directions in the second position. According to the invention, the rotating shaft and the baffle plate are arranged on the shell, the rotating shaft drives the baffle plate to rotate between the first position and the second position, and the baffle plate is simultaneously abutted against the same sides of the two door leaves at the first position to prevent the two door leaves from rotating, so that the door gap between the two door leaves is prevented from being enlarged; when the second position, the baffle gives way space for two door leaves, and two door leaves of being convenient for open naturally.

Description

Door shield

Technical Field

The invention relates to the technical field of balance air doors, in particular to a door shield.

Background

In coal mining operations, the normal operation of a ventilation system is of great importance. The normal ventilation system can ensure that underground personnel can normally breathe required oxygen, discharge harmful gas generated underground, adjust underground climatic conditions and create a good operation environment. The balance damper is an important component of the normal operation of the ventilation system.

In the related art, as shown in fig. 1 and 2, only one "Z" shaped fixed door stop is disposed above the balance damper, and when the balance damper is in a closed state and is subjected to unidirectional wind pressure, if the wind pressure is large, the lower end of the door leaf of the balance damper is easily deformed, so that the gap between the two door leaves is enlarged, and the normal use of the balance damper is affected.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Two door leafs of current balanced type air door are the reverse rotation motion, when closed condition, there is the door separation blade motion that can restrict two door leafs top and close the door and revolve the direction in the upper door frame, and the door leaf below is owing to there is not the restriction, under the wind pressure condition shown in fig. 2, two door leaf intermediate position departments, I top of door leaf have the door separation blade restriction but the below is free, II whole freedom of door leaf, if the partial pressure is great, the door leaf can have the deformation to lead to below "eight" word opening, and II upper and lower sides of door leaf all have "open" to "bending deformation" trend, lead to "crack clearance" to enlarge to the condition such as wind current short circuit takes place.

Therefore, when the air door is closed, the lower sides of the two door leaves are in contact with the door stop baffle at the same side, the deformation direction of the door leaves caused by air pressure is counteracted by the mutual action due to the rotation action of the door stop, the reverse rotation action of blocking the door leaves in a door closing state is formed, and the expansion of a door gap between the two door leaves when the air pressure is larger is avoided; when the door leaf is opened, the door leaf does not have acting force on the door stop, and the return spring in the door stop acts on the damping rotating door stop to rotate, so that space is made for the movement of the door leaf.

The door shield comprises a shell, a rotating shaft and a baffle plate, wherein the lower end of the rotating shaft is positioned in the shell and can rotate relative to the shell, and the rotating shaft is suitable for being positioned between two door leaves; the baffle is connected with the upper end of the rotating shaft and can rotate between a first position and a second position, the baffle is suitable for being abutted against the same side of the two door leaves simultaneously to prevent the two door leaves from rotating in the first position, and the baffle allows the two door leaves to rotate in opposite directions in the second position.

According to the invention, the rotating shaft and the baffle are arranged on the shell, the rotating shaft drives the baffle to rotate between the first position and the second position, and the baffle is simultaneously abutted against the same sides of the two door leaves at the first position to prevent the two door leaves from rotating, so that the door gap between the two door leaves is prevented from being enlarged; when the second position, the baffle gives way space for two door leaves, and two door leaves of being convenient for open naturally.

In some embodiments, the connecting disc is sleeved on the rotating shaft, and the baffle is vertically arranged on the connecting disc.

In some embodiments, the baffle has a first end and a second end, the first end being inclined in a direction away from the axis of rotation in a direction toward the first end, the second end being inclined in a direction away from the axis of rotation in a direction toward the second end.

In some embodiments, the housing includes a cylindrical member and a cover plate, one end of the cylindrical member is open to form an opening, the cover plate is covered on the opening to close the cylindrical member, and the lower end of the rotating shaft penetrates through the cover plate and extends into the cylindrical member.

In some embodiments, the device further comprises at least two fins, the fins are connected with the lower end of the rotating shaft and are uniformly distributed along the circumferential direction of the rotating shaft, and the outer edges of the fins are slidably matched with the inner wall of the cylindrical part.

In some embodiments, the fin further comprises a limiting protrusion, the limiting protrusion is arranged on the inner wall of the cylindrical part, and the limiting protrusion is used for limiting the rotation angle of the fin.

In some embodiments, the baffle plate further comprises a return spring, one end of the return spring is connected with the inner wall of the cylindrical part, the other end of the return spring is connected with one of the fins, and the return spring is used for returning the baffle plate after the baffle plate rotates from the second position to the first position.

In some embodiments, the edge of the cover plate protrudes from the cylindrical member, and the edge of the cover plate is provided with a plurality of through holes.

In some embodiments, the cover plate comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are semicircular to form the cover plate through splicing, a first protrusion is arranged on one side of the first cover plate adjacent to the second cover plate, a second protrusion is arranged on one side of the second cover plate adjacent to the first cover plate, and the first protrusion is pressed above the second protrusion.

In some embodiments, the sealing device further comprises a lip-shaped sealing ring, wherein the lip-shaped sealing ring is sleeved on the outer side of the rotating shaft to seal the rotating shaft and the cover plate.

Drawings

Fig. 1 is a schematic view of a conventional balance damper.

Fig. 2 is a schematic view of a conventional door stop in use.

Fig. 3 is a schematic view of a door stop according to the present invention.

Fig. 4 is another schematic view of the door stop of the present invention.

Fig. 5 is a schematic diagram showing a change in position of the baffle plate in the present invention.

Fig. 6 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 5.

Fig. 7 is a sectional view taken along line B-B in fig. 3.

Fig. 8 is a cross-sectional view taken along line C-C in fig. 3.

Fig. 9 is a schematic view of the installation position of the door shield of the present invention.

FIG. 10 is a schematic view of the damper position of the present invention with the damper closed.

Fig. 11 is a schematic view showing the position change of the barrier when the door is opened.

Fig. 12 is a partially enlarged schematic view of D in fig. 4.

Reference numerals:

the door comprises a shell 1, a rotating shaft 2, a baffle 3, a cover plate 4, a first cover plate 41, a second cover plate 42, a sealing layer 5, a first position 6, a second position 7, a door leaf I8, a door leaf II 9, a return spring 10, a through hole 11, a lip-shaped sealing ring 12, a first protrusion 13, a second protrusion 14, a bearing 15 and a limiting protrusion 16.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The technical scheme of the invention is specifically explained in the following by combining the attached figures 3-12;

as shown in fig. 3-5, a door stopper includes a housing 1, a rotating shaft 2 and a baffle 3, a lower end of the rotating shaft 2 is located in the housing 1 and is rotatable relative to the housing 1, the rotating shaft 2 is suitable for being located between two door leaves, a lower end of the rotating shaft 2 is movably disposed in the housing 1 and the rotating shaft 2 is located between the two door leaves, the baffle 3 is connected to an upper end of the rotating shaft 2, in this embodiment, the baffle 3 is fixed to the upper end of the rotating shaft 2, and the baffle 3 is rotatable between a first position 6 and a second position 7, the first position 6 and the second position 7 are regions that change circumferentially around the rotating shaft 2, that is, the baffle 3 is driven by the rotating shaft 2 to rotate between the first position 6 and the second position 7, and in this embodiment, the second position 7 region is a region that the first position region 6 reaches by rotating the rotating shaft 2 counterclockwise.

As shown in fig. 9-11, when the baffle 3 is in the first position 6, i.e. the damper is in the closed state, the baffle 3 is adapted to simultaneously abut against the same sides of the two door leaves to block the two door leaves from rotating, i.e. the baffle 3 simultaneously abuts against the same sides of the two door leaves, and the acting forces applied by the two door leaves to the baffle 3 are in a balanced state to block the two door leaves from rotating, so as to prevent the door gap between the two door leaves from expanding.

When baffle 3 is in second position 7 when the door leaf opened, baffle 3 allows two door leafs to rotate to opposite direction, that is to say baffle 3 gives way the space for two door leafs, does not have the effort between two door leafs and the baffle 3, and two door leafs of being convenient for open naturally, and two door leafs only rotate along the direction of opening separately under the effect of wind pressure, through changing the contact relation between baffle 3 and two door leafs, utilize the air door to the door leaf effort come mutual door leaf deformation that self-balancing air door leads to.

In some embodiments, the door shield further comprises a connecting disc, the connecting disc is sleeved on the rotating shaft 2, the baffle 3 is vertically arranged on the connecting disc, the connecting disc is sleeved at the upper end of the rotating shaft 2, the baffle 3 is arranged on the connecting disc, the rotating shaft 2 drives the connecting disc to rotate, the connecting disc drives the baffle 3 to rotate between the first position 6 and the second position 7, and the position relation between the baffle 3 and the two door leaves is changed by changing the position relation of the baffle 3.

It should be noted that the connecting disc may be replaced by another carrier such as a bracket, a connecting rod or a base, which is mounted on the rotating shaft, as long as the load-bearing baffle can rotate between the first position and the second position.

In some embodiments, the baffle 3 has a first end and a second end, the first end is inclined in a direction away from the rotating shaft 2 in a direction from the second end to the first end, and the second end is inclined in a direction away from the rotating shaft 2 in a direction from the first end to the second end, that is, the first end and the second end in the baffle 3 are respectively bent in a direction away from the rotating shaft 2, the bending angle of the second end is greater than or equal to that of the first end, and the bending angle range of the second end is greater than 0 ° and less than 90 °, in this embodiment, the bending angle of the second end is preferably 45 °, the bending angle of the first end is preferably 30 °, and when the baffle 3 is at the first position 6, the middle section of the baffle 3 abuts against the same side of the two door leaves; when the stop 3 is in the second position 7, the second end with the larger bending angle gives room for the door leaf.

In some embodiments, as shown in fig. 6, the housing 1 includes a cylindrical member and a cover plate 4, one end of the cylindrical member is open to form an opening, the cover plate 4 is covered on the opening to close the cylindrical member, the lower end of the rotating shaft 2 penetrates through the cover plate 4 and extends into the cylindrical member, a bearing 15 is further disposed in the cylindrical member, the lower end of the rotating shaft 2 penetrates through the cover plate 4 to be connected with the bearing 15 in the cylindrical member, and the rotating shaft 2 can rotate relative to the cylindrical member under the support of the bearing 15.

It should be noted that other bearing members may be used instead of the cylindrical member, such as the equipment box, the cabinet, the support frame, etc., and only need to be able to bear the rotating shaft for relative rotation.

It should be noted that the housing 1 further includes a lip-shaped sealing ring 12, the lip-shaped sealing ring 12 is sleeved on the outer side of the rotating shaft 2 to seal the rotating shaft 2 and the cover plate 4, the inner ring of the lip-shaped sealing ring 12 is sleeved on the outer side of the rotating shaft 2, the cover plate 4 is arranged in the outer ring of the lip-shaped sealing ring 12 in a penetrating manner, the lip-shaped sealing ring 12 is utilized to play a dustproof seal for the housing 1, and meanwhile, the lip-shaped sealing ring 12 can also serve as a bearing to adapt to the rotating support of the rotating shaft 2.

It should be noted that, as shown in fig. 8, the edge of the cover plate 4 protrudes from the cylindrical member, and the edge of the cover plate 4 is provided with a plurality of through holes 11, that is, the diameter of the cover plate 4 is larger than that of the cylindrical member, and the portion of the cover plate 4 protruding from the cylindrical member is provided with a plurality of through holes 11 for fixing feet, so that the cover plate 4 and the cylindrical member can be integrally fixed by passing a grounding bolt through the through holes 11.

It should be noted that, as shown in fig. 12, the cover plate 4 includes a first cover plate 41 and a second cover plate 42, the first cover plate 41 and the second cover plate 42 are both semicircular to form the cover plate 4, one side of the first cover plate 41 adjacent to the second cover plate 42 is provided with a first protrusion 13, one side of the second cover plate 42 adjacent to the first cover plate 41 is provided with a second protrusion 14, the first protrusion 13 is pressed above the second protrusion 14, that is, a trapezoidal table is formed between the first protrusion 13 and the first cover plate 41, a trapezoidal table is also formed between the second protrusion 14 and the second cover plate 42, the trapezoidal table on the first cover plate 41 is pressed on the trapezoidal table on the second cover plate 42, so that the tight connection between the first cover plate 41 and the second cover plate 42 is greatly enhanced.

It should be noted that, in order to enhance the tightness of the connection between the first cover plate 41 and the second cover plate 42, the first cover plate 41 and the second cover plate 42 may also be designed to be in a mortise-tenon connection structure, for example, the first cover plate 41 and the second cover plate 42 are designed to be in a dovetail structure, so as to enhance the tightness of the connection between the cover plates.

It should be noted that, in order to further improve the sealing performance between the first cover plate 41 and the cylindrical body, a sealant may be filled between the first cover plate 41 and the cylindrical body, and the second cover plate 42 and the cylindrical body to form a sealing layer 5, so as to achieve the sealing between the cover plate 4 and the cylindrical body.

In some embodiments, still include the fin in the shell, spacing arch 16 and reset spring 10, the fin is at least two, preferably two fins in this embodiment, two fins link to each other with the lower extreme of pivot 2, and the fin is along the circumference evenly distributed of pivot 2, the outer edge of fin cooperates with the inner wall slidable of tube-shaped spare, that is to say the fin can be relatively slided to the inner wall of tube-shaped spare under the drive of pivot 2, the fin is used for guaranteeing the stability of pivot 2 rotation in-process on the one hand, on the other hand can make pivot 2 rotate for the door leaf lets out the space and when the door leaf closes through the fin with reset spring 10 and spacing arch 16 cooperation, reset fast.

As shown in fig. 7, the limiting protrusions 16 are disposed on the inner wall of the cylindrical part, the number of the limiting protrusions 16 is two, the two sets of limiting protrusions 16 are respectively located on the inner walls of the cylindrical part on both sides of the fins, the two sets of limiting protrusions 16 are located on the same straight line, it is ensured that the two sets of fins touch the two sets of limiting protrusions 16 simultaneously, that is, a set of fins is disposed between the two sets of limiting protrusions 16, the limiting protrusions 16 are used for limiting the rotation angle of the fins, and it is ensured that the reset spring 10 is always in a stretching state when the rotating shaft 2 rotates within a certain range. One end of a return spring 10 is connected with the inner wall of the cylindrical part, the other end of the return spring 10 is connected with a fin, the return spring 10 is used for returning the baffle 3 after the baffle 3 is rotated to the first position 6 from the second position 7, namely, the baffle is in the air door closed state when the first position 6 is reached, the first end and the second end in the door shield respectively resist two door leaves, the two door leaves are respectively a door leaf I8 and a door leaf II 9, the return spring 10 is in the stretching state at the moment, when the two door leaves are opened, the return spring 10 in the stretching state rapidly pushes the rotating shaft 2 to be reset to give way for the door leaf, and the baffle 3 rapidly reaches the second position 7. Utilize the tensile deformation storage elastic potential energy that reset spring 10 caused when the door shield is rotatory, when needs reset, can reset the door shield fast, prevent that the door shield from blockking the action of opening of door leaf, spacing arch 16 blocks baffle 3 simultaneously and resets to a certain position and end promptly, and reset spring 10 is still at tensile state this moment to this can keep the door shield fixed.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A door shield of balanced type air door, its characterized in that includes:

a housing;

the lower end of the rotating shaft is positioned in the shell and can rotate relative to the shell, and the rotating shaft is suitable for being positioned between the two door leaves;

the baffle is connected with the upper end of the rotating shaft and can rotate between a first position and a second position, the first position is a door leaf closed state, the second position is a door leaf open state, the baffle is suitable for being abutted against the same side of the lower ends of the two door leaves simultaneously to block the two door leaves from rotating at the first position, and the baffle allows the two door leaves to rotate in opposite directions at the second position.

2. The door shield of the balanced type air door of claim 1, further comprising a connecting disc, wherein the connecting disc is sleeved on the rotating shaft, and the baffle is vertically arranged on the connecting disc.

3. The balanced damper door stop according to claim 2, wherein the baffle has a first end and a second end, the first end being angled away from the axis of rotation in a direction toward the first end at the second end, and the second end being angled away from the axis of rotation in a direction toward the second end at the first end.

4. The door shield for a balanced damper according to claim 1, wherein said housing includes a cylindrical member and a cover plate, one end of said cylindrical member is open to form an opening, said cover plate is covered on said opening to close said cylindrical member, and a lower end of said shaft penetrates said cover plate and extends into said cylindrical member.

5. The door stop of the balanced type air door according to claim 4, characterized in that the door stop further comprises at least two fins, the fins are connected with the lower end of the rotating shaft and are uniformly distributed along the circumferential direction of the rotating shaft, and the outer edges of the fins are slidably matched with the inner wall of the cylindrical member.

6. The door stop of the balanced type air door according to claim 5, further comprising a limiting protrusion, wherein the limiting protrusion is provided on the inner wall of the cylindrical member, and the limiting protrusion is used for limiting the rotation angle of the fin.

7. The door stop for a balanced damper according to claim 5 further comprising a return spring, one end of said return spring being connected to an inner wall of said tubular member and the other end of said return spring being connected to one of said fins, said return spring being adapted to return said baffle after said baffle has been rotated from said second position to said first position.

8. The door stop of a balanced damper according to claim 4 wherein the edge of said cover plate protrudes from said cylindrical member and the edge of said cover plate is provided with a plurality of through holes.

9. The door stop of a balanced type air door according to claim 4, wherein the cover plate comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are both semicircular to form the cover plate, a first protrusion is disposed on one side of the first cover plate adjacent to the second cover plate, a second protrusion is disposed on one side of the second cover plate adjacent to the first cover plate, and the first protrusion is pressed above the second protrusion.

10. The door shield of the balanced type air door according to any one of claims 4 to 9, further comprising a lip seal, wherein the lip seal is sleeved on the outer side of the rotating shaft to seal the rotating shaft and the cover plate.